From the
Model Mayhem FAQ:
What is VIP and Premium and why do I hear so much about it?
Model Mayhem accounts are free to use, but we also offer an upgrade/subscription service that gives a boost to the basic features available on the site. There are different levels of upgrades at different price points:
Premium will get you a substantial bit more than a basic membership but
VIP is the best you can get.
You can see all of the features and options between the various subscription levels here:
www.modelmayhem.com/upgrade
Here’s a small sampling of benefits:
Increased number of photos
Increased number of daily private messages
Reduced time between front-page announcements
Increased number of casting calls and notices announcements
Preferred placement on results pages